/* ===== 电玩城平台 · shared site kit ===== */
:root{
  --ink:#0A0618;
  --ink-2:#141A3B;
  --teal:#062B2A;
  --cyan:#2BF5E6;
  --violet:#8B5CF6;
  --orange:#FF7A1A;
  --gold:#FFC93C;
  --mist:#F4F7FF;
  --muted:#9AA0C8;
  --rose:#FF4D8D;
  --shell-w:1180px;
  --radius:18px;
  --radius-sm:10px;
  --glow:0 0 0 1px rgba(43,245,230,.18),0 18px 42px -24px rgba(43,245,230,.55);
  --font-display:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Roboto Mono",monospace;
}

/* ---- reset ---- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink);
  background-image:
    radial-gradient(60% 42% at 88% -6%,rgba(139,92,246,.22),transparent 70%),
    radial-gradient(52% 36% at 4% 0%,rgba(43,245,230,.13),transparent 72%);
  background-repeat:no-repeat;
  color:var(--mist);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  word-break:break-word;
  overflow-wrap:break-word;
}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:var(--cyan)}
button{font:inherit}
h1,h2,h3,h4,.display{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.02em;
  text-wrap:balance;
  color:var(--mist);
}
p{margin:0 0 1em}
ul,ol{margin:0}
#main-content{scroll-margin-top:92px}
[id]{scroll-margin-top:92px}

/* ---- focus / motion ---- */
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
.skip-link{
  position:absolute;left:12px;top:-70px;z-index:300;
  display:inline-block;padding:10px 18px;
  background:var(--cyan);color:#04121a;
  font-weight:800;font-size:14px;text-decoration:none;
  border-radius:0 0 12px 12px;
  box-shadow:0 10px 30px -12px rgba(43,245,230,.9);
  transition:top .18s ease;
}
.skip-link:focus,.skip-link:focus-visible{top:0;color:#04121a}

/* ---- shell ---- */
.shell{
  width:100%;
  max-width:var(--shell-w);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}

/* ---- header ---- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:linear-gradient(180deg,rgba(10,6,24,.98) 0%,rgba(10,6,24,.9) 100%);
  border-bottom:1px solid rgba(43,245,230,.24);
  box-shadow:0 18px 40px -34px rgba(43,245,230,.9);
}
.header-progress{
  position:absolute;left:0;right:0;bottom:0;height:3px;
  background:rgba(43,245,230,.1);
  overflow:hidden;
}
.header-progress span{
  display:block;width:0;height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 55%,var(--orange));
  box-shadow:0 0 14px var(--cyan);
}
.header-inner{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(14px,3vw,40px);
  min-height:78px;
  padding-block:12px;
}
.brand-block{display:flex;align-items:center;gap:14px;min-width:0}
.brand-mark{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--mist)}
.brand-glyph{
  flex:none;
  width:40px;height:40px;
  display:grid;place-items:center;
  font-size:17px;color:#04121a;
  background:linear-gradient(135deg,var(--cyan),var(--violet));
  border-radius:12px 12px 12px 4px;
  box-shadow:0 0 20px -4px var(--cyan);
}
.brand-text{display:flex;flex-direction:column;line-height:1.16;gap:2px}
.brand-name{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:.02em}
.brand-tag{font-family:var(--font-mono);font-size:10px;letter-spacing:.24em;color:var(--cyan)}
.brand-note{
  margin:0;padding-left:14px;
  border-left:1px solid rgba(154,160,200,.38);
  font-size:12px;line-height:1.5;letter-spacing:.08em;color:var(--muted);
}
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;
  border-radius:12px;
  border:1px solid rgba(43,245,230,.42);
  background:rgba(20,26,59,.9);
  color:var(--mist);
  font-weight:700;font-size:14px;letter-spacing:.06em;
  cursor:pointer;
  transition:border-color .18s ease,background-color .18s ease;
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(43,245,230,.12)}
.nav-toggle-bars{display:grid;gap:4px;width:20px}
.nav-toggle-bars i{display:block;height:2px;border-radius:2px;background:var(--cyan);transition:transform .18s ease,opacity .18s ease}
.site-header[data-open="true"] .nav-toggle-bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-bars i:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle-bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle-label{white-space:nowrap}
.primary-nav{display:flex;align-items:center;gap:clamp(12px,2vw,26px)}
.nav-list{display:flex;align-items:center;gap:clamp(4px,1vw,12px);list-style:none;padding:0}
.nav-list a{
  position:relative;display:inline-block;
  padding:9px 11px;
  color:var(--mist);text-decoration:none;
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border-radius:8px;
  transition:color .16s ease,background-color .16s ease;
}
.nav-list a::after{
  content:"";position:absolute;left:11px;right:11px;bottom:3px;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .18s ease;
}
.nav-list a:hover,.nav-list a:focus-visible{color:var(--cyan);background:rgba(43,245,230,.09)}
.nav-list a:hover::after,.nav-list a:focus-visible::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--cyan);background:rgba(43,245,230,.13)}
.nav-list a[aria-current="page"]::after{height:3px;transform:scaleX(1)}
.nav-pod{
  display:inline-flex;flex-direction:column;gap:1px;
  padding:9px 15px;
  border-radius:12px 12px 12px 3px;
  text-decoration:none;color:var(--mist);
  border:1px solid rgba(43,245,230,.45);
  background:linear-gradient(135deg,rgba(43,245,230,.15),rgba(139,92,246,.2));
  white-space:nowrap;
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.nav-pod-label{font-family:var(--font-mono);font-size:9px;letter-spacing:.22em;color:var(--cyan)}
.nav-pod-name{font-size:13px;font-weight:800;letter-spacing:.02em}
.nav-pod:hover,.nav-pod:focus-visible{
  border-color:var(--orange);
  transform:translateY(-2px);
  box-shadow:0 12px 26px -14px rgba(255,122,26,.95);
}

/* ---- footer ---- */
.site-footer{
  margin-top:clamp(48px,8vw,110px);
  background-image:
    radial-gradient(80% 120% at 10% 0%,rgba(139,92,246,.24),transparent 62%),
    radial-gradient(70% 100% at 92% 20%,rgba(43,245,230,.13),transparent 66%),
    linear-gradient(180deg,var(--ink) 0%,var(--teal) 58%,#05030f 100%);
  border-top:1px solid rgba(43,245,230,.24);
  color:var(--mist);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.35fr 1fr;
  gap:clamp(24px,4vw,48px);
  padding-block:clamp(40px,6vw,72px);
}
.footer-col{min-width:0}
.footer-brand .footer-logo{
  margin:0 0 12px;
  font-family:var(--font-display);font-weight:800;font-size:20px;letter-spacing:.02em;
  color:var(--mist);
}
.footer-brand .footer-logo::after{
  content:"";display:block;width:52px;height:3px;margin-top:10px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  border-radius:2px;
}
.footer-line{margin:0 0 12px;font-size:15px;line-height:1.75;color:#c9cee8;max-width:34ch}
.footer-meta{margin:0 0 8px;font-size:13px;line-height:1.7;color:var(--muted)}
.footer-title{
  margin:0 0 16px;
  font-size:14px;font-weight:800;letter-spacing:.16em;
  color:var(--cyan);
  font-family:var(--font-mono);
  padding-left:12px;
  border-left:3px solid var(--violet);
}
.footer-list{list-style:none;padding:0;display:grid;gap:8px}
.footer-list a{
  display:inline-block;
  color:#cdd2ea;text-decoration:none;font-size:14.5px;
  border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease,transform .16s ease;
}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--gold);border-bottom-color:var(--gold);transform:translateX(2px)}
.footer-contact{display:grid;gap:10px}
.footer-contact-item{
  margin:0;
  display:grid;gap:2px;
  font-size:14px;line-height:1.7;color:#cdd2ea;
  padding:10px 12px;
  border-radius:10px;
  background:rgba(6,43,42,.55);
  border:1px solid rgba(43,245,230,.16);
  transition:border-color .18s ease;
}
.footer-contact-item span{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.22em;
  color:var(--cyan);
}
.footer-contact-item:hover{border-color:rgba(43,245,230,.45)}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding-block:18px 26px;
  border-top:1px solid rgba(154,160,200,.22);
  font-size:13px;color:var(--muted);
}
.footer-base p{margin:0}
.footer-legal{font-family:var(--font-mono);letter-spacing:.08em}
.footer-legal a{color:var(--muted);text-decoration:none}
.footer-legal a:hover{color:var(--cyan)}

/* ---- buttons ---- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;
  border-radius:14px 14px 14px 4px;
  border:1px solid transparent;
  font-family:var(--font-body);font-weight:800;font-size:15px;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--orange),#ff9d4d);
  color:#1a0b02;
  box-shadow:0 14px 30px -16px rgba(255,122,26,.95);
}
.btn-primary:hover,.btn-primary:focus-visible{transform:translateY(-2px);box-shadow:0 20px 36px -16px rgba(255,122,26,1);color:#180a01}
.btn-ghost{
  background:rgba(43,245,230,.07);
  border-color:rgba(43,245,230,.5);
  color:var(--cyan);
}
.btn-ghost:hover,.btn-ghost:focus-visible{background:rgba(43,245,230,.18);color:#04121a;border-color:var(--cyan)}
.btn-small{padding:9px 16px;font-size:13px;border-radius:10px 10px 10px 3px}

/* ---- chips / badges / tags ---- */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;
  border-radius:999px;
  border:1px solid rgba(154,160,200,.4);
  background:rgba(20,26,59,.72);
  color:var(--mist);
  font-size:14px;font-weight:700;text-decoration:none;cursor:pointer;
  transition:border-color .16s ease,color .16s ease,background-color .16s ease,transform .16s ease;
}
.chip:hover,.chip:focus-visible{border-color:var(--cyan);color:var(--cyan);transform:translateY(-1px)}
.chip[aria-pressed="true"],.chip.is-active{
  border-color:var(--cyan);
  color:var(--cyan);
  background:linear-gradient(135deg,rgba(43,245,230,.2),rgba(139,92,246,.22));
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  border:1px solid rgba(43,245,230,.5);
  color:var(--cyan);background:rgba(43,245,230,.1);
  white-space:nowrap;
}
.badge-gold{border-color:rgba(255,201,60,.62);color:var(--gold);background:rgba(255,201,60,.13)}
.badge-violet{border-color:rgba(139,92,246,.6);color:#c7b1ff;background:rgba(139,92,246,.18)}
.badge-orange{border-color:rgba(255,122,26,.62);color:#ffb27a;background:rgba(255,122,26,.16)}
.badge-rose{border-color:rgba(255,77,141,.6);color:#ff9ebd;background:rgba(255,77,141,.14)}
.tag{
  display:inline-block;
  padding:3px 9px;border-radius:6px 6px 6px 2px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:#cbb6ff;background:rgba(139,92,246,.18);
  border:1px solid rgba(139,92,246,.45);
}

/* ---- breadcrumbs ---- */
.breadcrumbs{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;color:var(--muted)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;padding:0}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li+li::before{content:"//";font-size:10px;color:rgba(43,245,230,.55)}
.breadcrumbs a{color:var(--muted);text-decoration:none;transition:color .16s ease}
.breadcrumbs a:hover,.breadcrumbs a:focus-visible{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--mist)}

/* ---- chapter / band / divider ---- */
.chapter{display:flex;align-items:baseline;flex-wrap:wrap;gap:14px;margin-bottom:clamp(16px,2vw,22px)}
.chapter-no{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  padding:5px 12px;
  color:#160d02;background:var(--gold);
  border-radius:6px 6px 6px 0;
  clip-path:polygon(0 0,100% 0,100% 66%,calc(100% - 9px) 100%,0 100%);
}
.chapter-title{font-size:clamp(22px,3vw,32px)}
.section-band{
  position:relative;
  padding:clamp(16px,2.4vw,24px) clamp(16px,3vw,28px);
  border-radius:var(--radius-sm);
  border:1px solid rgba(43,245,230,.26);
  border-left:6px solid var(--cyan);
  background:linear-gradient(100deg,rgba(43,245,230,.14),rgba(139,92,246,.17) 55%,rgba(255,122,26,.12));
}
.section-band p:last-child{margin-bottom:0}
.divider-pixel{
  height:12px;
  margin-block:clamp(28px,5vw,56px);
  border-radius:2px;
  background-image:repeating-linear-gradient(90deg,var(--cyan) 0 8px,transparent 8px 18px,var(--violet) 18px 26px,transparent 26px 44px);
  opacity:.34;
}

/* ---- prose / lead / mono ---- */
.prose{max-width:72ch;font-size:17px;line-height:1.85;color:#d6daef}
.prose h2{margin:2.1em 0 .7em;font-size:clamp(21px,2.4vw,27px)}
.prose h3{margin:1.7em 0 .6em;font-size:clamp(18px,2vw,21px);color:#e9ecfb}
.prose p{margin:0 0 1.1em}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1em}
.prose li{margin-bottom:.45em}
.prose strong{color:var(--mist)}
.prose a{color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(43,245,230,.45)}
.prose a:hover,.prose a:focus-visible{color:var(--gold);border-bottom-color:var(--gold)}
.lead{max-width:64ch;font-size:clamp(17px,1.8vw,20px);line-height:1.78;color:#c9cee8}
.mono{font-family:var(--font-mono);letter-spacing:.06em}

/* ---- grid / cards ---- */
.grid-auto{
  display:grid;
  gap:clamp(14px,2.4vw,24px);
  grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));
}
.card{
  position:relative;
  padding:clamp(18px,2.6vw,28px);
  border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(20,26,59,.94),rgba(10,6,24,.96));
  border:1px solid rgba(154,160,200,.22);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.card:hover,.card:focus-within{border-color:rgba(43,245,230,.55);transform:translateY(-3px);box-shadow:var(--glow)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.card-title{margin:0 0 10px;font-size:clamp(17px,2vw,20px)}
.card-head .card-title{margin:0}
.card-body{font-size:15px;line-height:1.75;color:#c5cae4}
.card-body p:last-child{margin-bottom:0}

/* ---- stats ---- */
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.stat{
  padding:16px 18px;
  border-radius:14px;
  background:rgba(6,43,42,.6);
  border:1px solid rgba(43,245,230,.2);
}
.stat-value{
  display:block;
  font-family:var(--font-mono);font-size:clamp(22px,3vw,28px);font-weight:700;
  color:var(--cyan);letter-spacing:.02em;
  text-shadow:0 0 16px rgba(43,245,230,.55);
}
.stat-label{display:block;font-size:13px;letter-spacing:.06em;color:var(--muted)}

/* ---- steps ---- */
.steps{
  list-style:none;padding:0;margin:0;
  display:grid;gap:14px;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  counter-reset:step;
}
.steps li{
  padding:20px 18px 18px;
  border-radius:14px;
  background:linear-gradient(150deg,rgba(139,92,246,.18),rgba(10,6,24,.92));
  border:1px solid rgba(139,92,246,.42);
  transition:border-color .18s ease,transform .18s ease;
}
.steps li:hover{border-color:var(--cyan);transform:translateY(-2px)}
.steps li::before{
  counter-increment:step;
  content:"0" counter(step);
  display:block;margin-bottom:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;color:var(--gold);
}

/* ---- faq ---- */
.faq{display:grid;gap:12px}
.faq details{
  padding:0 18px;
  border-radius:14px;
  background:rgba(20,26,59,.82);
  border:1px solid rgba(154,160,200,.24);
  transition:border-color .18s ease,background-color .18s ease;
}
.faq details[open]{border-color:rgba(43,245,230,.5);background:rgba(6,43,42,.58)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 0;
  cursor:pointer;
  font-weight:700;color:var(--mist);
  list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--font-mono);font-size:20px;line-height:1;color:var(--cyan)}
.faq details[open] summary::after{content:"–";color:var(--gold)}
.faq p{margin:0 0 16px;font-size:15px;line-height:1.78;color:#c5cae4}

/* ---- media frame ---- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  border-radius:var(--radius);
  border:1px solid rgba(43,245,230,.24);
  background-image:
    radial-gradient(120% 90% at 14% 8%,rgba(139,92,246,.35),transparent 62%),
    radial-gradient(90% 80% at 86% 92%,rgba(43,245,230,.28),transparent 64%),
    linear-gradient(160deg,var(--ink-2),var(--ink));
}
.media-frame img,.media-frame video{width:100%;height:100%;object-fit:cover;display:block}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(10,6,24,.3) 0 1px,transparent 1px 4px);
  opacity:.5;
}
.media-frame[data-ratio="wide"]{aspect-ratio:21/9}
.media-frame[data-ratio="square"]{aspect-ratio:1/1}
.media-frame[data-ratio="tall"]{aspect-ratio:4/5}

/* ---- reveal / state ---- */
.js-reveal [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none}
[data-chapter-nav] a.is-active{color:var(--cyan);border-color:var(--cyan)}

/* ---- responsive ---- */
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1.4fr 1fr;gap:clamp(24px,4vw,36px)}
}
@media (max-width:899px){
  .nav-toggle{display:inline-flex}
  .brand-note{display:none}
  .header-inner{min-height:70px;gap:12px}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:16px;
    padding:18px clamp(16px,4vw,40px) 24px;
    background:linear-gradient(180deg,#0d0a20,#0a0618 92%);
    border-top:1px solid rgba(43,245,230,.16);
    border-bottom:1px solid rgba(43,245,230,.34);
    box-shadow:0 30px 44px -32px #000;
    max-height:0;opacity:0;visibility:hidden;overflow:hidden;pointer-events:none;
    transition:max-height .3s ease,opacity .22s ease,visibility .22s;
  }
  .site-header[data-open="true"] .primary-nav{
    max-height:82vh;opacity:1;visibility:visible;overflow-y:auto;pointer-events:auto;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-list a{
    display:block;
    padding:12px 14px;
    font-size:16px;
    border:1px solid transparent;
  }
  .nav-list a::after{left:14px;right:auto;width:26px;bottom:6px}
  .nav-list a[aria-current="page"]{border-color:rgba(43,245,230,.35)}
  .nav-pod{align-self:flex-start;margin-top:4px}
}
@media (max-width:719px){
  body{font-size:16px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-base{flex-direction:column;align-items:flex-start;gap:6px}
  .btn{width:100%;justify-content:center}
  .grid-auto{grid-template-columns:1fr}
  .chapter{gap:10px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js-reveal [data-reveal]{opacity:1;transform:none}
  .media-frame::after{display:none}
}